Leroy Sane's brace gave Manchester City a battling 2-1 win at West Brom in the third round of the EFL Cup, but victory came at a price as Ilkay Gundogan was hit by another possible injury blow.
Sane has been restricted to one Premier League start so far this season, the odd-man out in Pep Guardiola's gifted forward line, but he grasped his chance with aplomb at The Hawthorns.
The 21-year-old's early opener preceded a swashbuckling first-half showing from a City side performing in the same vein as the recent romps against Liverpool, Feyenoord and Watford despite Guardiola making eight changes.
West Brom imposed their will on the match after the break, with the sight of Germany midfielder Gundogan – making a first start since tearing his anterior cruciate ligament last December – limping off following an ugly lunge from Claudio Yacob, noticeably unsettling City.
Yacob warmed to his role as villain by snatching an equaliser but the winner arrived against the run of play in the 77th minute, with Sane collecting Bernardo Silva's pass, cutting inside Craig Dawson and curling home past the excellent Ben Foster.
City controlled the action from kick-off, with West Brom's first touch of the ball coming when goalkeeper Foster denied Gundogan from Raheem Sterling's third-minute cross, with Sane on hand to smash home the rebound.
Gundogan was at the heart of much of City's impressive work early on and found space inside the West Brom box once more in the 18th minute, only for returning West Brom centre-back Gareth McAuley to make a vital block.
City took the resulting corner short, catching West Brom napping, and Sane chipped to the back post, where Foster palmed away Eliaquim Mangala's header.
Full-backs Fabian Delph and Danilo came infield to bolster a 26th-minute City attack and the latter picked out fellow Brazilian Gabriel Jesus, who engineered room in the box before blasting over.
Foster excelled himself in first-half stoppage time, clawing a curling effort from the rampaging Sterling away from his top corner.
Guardiola's only complaint over City's first-half efforts would have related to them not having a more commanding lead for their dominance and West Brom forward Jay Rodriguez glanced a Dawson cross wide early in the second period to underline the precariousness of their position.
DOUBLETROUBLE pic.twitter.com/Al26SdTqeg— Manchester City (@ManCity) September 20, 2017
City were enduring their most ragged period of the contest when, in the 54th minute, Gundogan broke up a West Brom attack and surged forward. His run was halted on the edge of the opposition penalty area, with Yacob booked and Gundogan unable to continue.
Foster remained on top in his personal duel with Sterling as the England winger's latest menacing dribble went unrewarded but James Morrison prodded wide at the other end, some excellent hold-up play from Hal Robson-Kanu fashioning a 69th-minute opening.
Guardiola's men did not heed that warning and Yacob, already far from popular with the travelling supporters, was allowed too much room to dispatch Kieran Gibbs' corner through Claudio Bravo's legs.
Robson-Kanu fired wide and Bravo saved from Morrison as West Brom suddenly appeared the likely victors, but Sane stepped up to brilliantly settle matters.
West Brom ensured their opponents made anxious progress towards full-time, with Salomon Rondon heading agonisingly wide from a Matt Phillips cross before Robson-Kanu clipped the outside of the post in stoppage time.
|I´ve proved myself over and over - Garcia|
|Ocon negotiating with Williams for 2019|
|Kvitova´s Wuhan quest ended by Pavlyuchenkova|
|Hummels impressed by ´incredible´ Sanches|
|Brewers benefit from Pirates´ trade deadline acquisition of Archer|
|Barty upsets Kerber in Wuhan|
|England could still pick Cipriani despite training camp snub|
|Astros become first defending champions to reach 100 wins since 1990 Athletics|
|Wilder waiting for ´real offer´ to fight Joshua|
|LeBron focusing on patience after first Lakers practice|
|Pochettino expects Spurs in new stadium by Christmas|
|Inzaghi: With Ronaldo, Juve are best team in Europe|
|Some people talk too much – Icardi hits back at critics|
|Kovac, Robben praise Augsburg after draw|
|Angels star Ohtani to undergo Tommy John surgery|
|Simeone tips Gimenez to be fit for Madrid derby|
|Smith on his NBA Finals miscue: People make mistakes all the time|
|Rams CB Talib to have ankle surgery|
|Cousins ´feeling a lot better´, still unsure when he´ll return|
|I knew we´d be in trouble with Jones on penalties – Mourinho|
|Coyotes forward Galchenyuk expected to miss opener|
|Guardiola won´t compare Foden to Iniesta|
|Lampard shell-shocked as Derby win at Old Trafford|
|Ryder Cup 2018: USA celebrities take the honours|
|Manchester United´s torrid penalty shoot-out run continues against Derby|
|Guardiola: Foden already a great, great player|
|Atletico Madrid 3 Huesca 0: Rojiblancos cruise ahead of Madrid derby|
|EFL Cup: Lampard dumps out Mourinho, Burnley lose at Burton Albion|
|Mourinho denies Pogba row despite stripping midfielder of vice-captaincy|
|Fabinho situation not complicated, insists Klopp|
|Manchester United 2 Derby County 2 (Derby win 8-7 on pens): Lampard heaps pressure on Mourinho|
|Afghanistan snatch tie after Shahzad pummels India|
|Inter 2 Fiorentina 1: D´Ambrosio maintains Nerazzurri revival|
|Oxford United 0 Manchester City 3: Foden stars as EFL Cup holders cruise into round four|
|Cousin takes Gabon post after Aubameyang rejection|
|Bayern Munich 1 Augsburg 1: Neuer error costs champions|
|Paris Saint-Germain must be a Champions League force to help Neymar - Baptista|
|Salgado warns of ´war´ in Spanish football|
|Cech deserves Arsenal place, says Seaman|
|Halep and Garcia among seeds to fall in Wuhan|
|F1 Raceweek: Mercedes taking no comfort in points advantage|
|Benitez charged by FA for referee comment relating to Zaha treatment|
|Cibulkova dumps out hampered Halep in Wuhan|
|Mourinho questions his players amid reports Pogba won´t captain United again|
|European Ryder Cup diary: Fleetwood´s hair delights Poulter|
|USA Ryder Cup diary: Tiger´s roaring reception, McEnroe´s bold prediction|
|Loans to be limited under new FIFA proposal|
|Prolific Nadolo signs new Montpellier contract|
|Modric? For us, Messi is the best – Valverde|
|Murray makes winning start in Shenzhen|
|Mickelson would cherish first victory on European soil|
|Hodge hoping pressure proves too much for South Africa|
|Woodward in show of support for under-fire Mourinho|
|Mickelson jokes he wants ´a shot a side´ from Tiger in Thanksgiving showdown|
|Reed: Captain America is a villain in Europe|
|Duminy to captain Proteas as Elgar replaces injured Amla|
|No Tottenham timeline for Lloris, Vorm returns|
|Woods ready for ´awesome environment´ on Ryder Cup opening hole|
|Tony Bellew determined to prove doubters wrong against Oleksandr Usyk|
|Tuchel explains why he likes Neymar at number 10|
|Manchester United smash revenue record but profits down|
|Furyk downplays Ryder Cup pairings talk, says Tuesday is about individuals|
|Rejuvenated Tiger out to improve poor Ryder Cup record|
|Saunders fined £100,000 for ´sickening´ online video|
|Hazard can reach his full potential with Sarri´s Chelsea - Zola|
|Ryder Cup heading back in Europe´s direction, says Niall Horan|
|Wow! Klopp hails Sarri´s Chelsea transformation|
|Giovinazzi to partner Raikkonen at Sauber in 2019|
|Bjorn backs ´phenomenal´ Rahm to continue trend of Spanish success|
|Durant in no rush to decide Warriors future|